Thanks everyone,
@Jesse J @Aussiemj
I did notice that my back passenger tail light didn't have a ground/ earth/ chingadera on it but the back driver side did.
They should all have one for there respective cluster or does the whole back end share one common ground?
oh, took the truck out today and my parking lights fuse shorted, if that gives someone some more let me know.
@MiNi Beastill be checking on the combination switch if its not the chingadera .